This is a note to let you know that I've just added the patch titled cxl: Route eeh events to all drivers in cxl_pci_error_detected() to the 4.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: cxl-route-eeh-events-to-all-drivers-in-cxl_pci_error_detected.patch and it can be found in the queue-4.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 4f58f0bf155e87dda31a3088b1e107fa9dd79f0e Mon Sep 17 00:00:00 2001 From: Vaibhav Jain <vaibhav@xxxxxxxxxxxxxxxxxx> Date: Thu, 27 Apr 2017 10:58:22 +0530 Subject: cxl: Route eeh events to all drivers in cxl_pci_error_detected() From: Vaibhav Jain <vaibhav@xxxxxxxxxxxxxxxxxx> commit 4f58f0bf155e87dda31a3088b1e107fa9dd79f0e upstream. Fix a boundary condition where in some cases an eeh event that results in card reset isn't passed on to a driver attached to the virtual PCI device associated with a slice. This will happen in case when a slice attached device driver returns a value other than PCI_ERS_RESULT_NEED_RESET from the eeh error_detected() callback. This would result in an early return from cxl_pci_error_detected() and other drivers attached to other AFUs on the card wont be notified. The patch fixes this by making sure that all slice attached device-drivers are notified and the return values from error_detected() callback are aggregated in a scheme where request for 'disconnect' trumps all and 'none' trumps 'need_reset'. Fixes: 9e8df8a21963 ("cxl: EEH support") Signed-off-by: Vaibhav Jain <vaibhav@xxxxxxxxxxxxxxxxxx> Reviewed-by: Andrew Donnellan <andrew.donnellan@xxxxxxxxxxx> Acked-by: Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/misc/cxl/pci.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -1782,7 +1782,7 @@ static pci_ers_result_t cxl_pci_error_de { struct cxl *adapter = pci_get_drvdata(pdev); struct cxl_afu *afu; - pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET; + pci_ers_result_t result = PCI_ERS_RESULT_NEED_RESET, afu_result; int i; /* At this point, we could still have an interrupt pending. @@ -1886,15 +1886,18 @@ static pci_ers_result_t cxl_pci_error_de for (i = 0; i < adapter->slices; i++) { afu = adapter->afu[i]; - result = cxl_vphb_error_detected(afu, state); - - /* Only continue if everyone agrees on NEED_RESET */ - if (result != PCI_ERS_RESULT_NEED_RESET) - return result; + afu_result = cxl_vphb_error_detected(afu, state); cxl_context_detach_all(afu); cxl_ops->afu_deactivate_mode(afu, afu->current_mode); pci_deconfigure_afu(afu); + + /* Disconnect trumps all, NONE trumps NEED_RESET */ + if (afu_result == PCI_ERS_RESULT_DISCONNECT) + result = PCI_ERS_RESULT_DISCONNECT; + else if ((afu_result == PCI_ERS_RESULT_NONE) && + (result == PCI_ERS_RESULT_NEED_RESET)) + result = PCI_ERS_RESULT_NONE; } /* should take the context lock here */ Patches currently in stable-queue which might be from vaibhav@xxxxxxxxxxxxxxxxxx are queue-4.11/cxl-force-context-lock-during-eeh-flow.patch queue-4.11/cxl-route-eeh-events-to-all-drivers-in-cxl_pci_error_detected.patch